Health & Fitness Calculators
BMI, calories, heart rate, pregnancy, and other health calculators.
74 calculators available
BMI
Body Mass Index from height and weight.
BMR
Basal metabolic rate — calories your body burns at rest.
TDEE
Total daily energy expenditure based on activity level.
Calorie
Daily calorie needs (TDEE) by activity level.
Water Intake
Daily water intake recommendation based on weight and activity.
Macro Calculator
Daily macronutrient targets based on goals and activity.
Protein Intake
Daily protein recommendation based on weight and activity.
Pregnancy Weight Gain
Recommended weight gain range during pregnancy by BMI.
Due Date
Estimate your delivery due date from the last menstrual period.
Conception Date
Estimate the likely conception date from a due date or last period.
Blood Pressure
Classify systolic and diastolic readings into blood pressure categories.
Heart Rate Zones
Training heart rate zones based on your maximum heart rate.
VO2 Max
Estimate maximum oxygen uptake from a timed run or walk test.
Pace Calculator
Running pace, speed, and finish time for any distance.
Calories Burned
Estimate calories burned during physical activities.
Weight Loss
Calorie deficit and timeline to reach your target weight.
Lean Body Mass
Estimate lean body mass from weight and body fat percentage.
Body Fat
Body fat % using the US Navy method.
Ideal Weight
Ideal weight by height and gender.
Dosage
Medication dosage by weight.
Age
Exact age in years, months, and days.
Ovulation
Estimate fertile window.
calc.lifespan.name
calc.lifespan.desc
calc.pregnancy-due-date-ivf.name
calc.pregnancy-due-date-ivf.desc
calc.baby-growth.name
calc.baby-growth.desc
calc.hydration.name
calc.hydration.desc
calc.medication-dose.name
calc.medication-dose.desc
calc.vitamin-d.name
calc.vitamin-d.desc
calc.hydration-timeline.name
calc.hydration-timeline.desc
calc.allergy-season.name
calc.allergy-season.desc
calc.bmi-comparison.name
calc.bmi-comparison.desc
calc.resting-metabolic.name
calc.resting-metabolic.desc
calc.glycemic-load.name
calc.glycemic-load.desc
calc.cholesterol-ratio.name
calc.cholesterol-ratio.desc
calc.kidney-function.name
calc.kidney-function.desc
calc.bone-density.name
calc.bone-density.desc
calc.vision-acuity.name
calc.vision-acuity.desc
calc.hearing-loss.name
calc.hearing-loss.desc
calc.sun-exposure.name
calc.sun-exposure.desc
calc.postpartum-calorie.name
calc.postpartum-calorie.desc
calc.pregnancy-calories.name
calc.pregnancy-calories.desc
calc.gestational-age.name
calc.gestational-age.desc
calc.waist-hip-ratio.name
calc.waist-hip-ratio.desc
Sleep
Recommended sleep duration based on age.
calc.blood-alcohol.name
calc.blood-alcohol.desc
calc.carb-calculator.name
calc.carb-calculator.desc
calc.fiber-calculator.name
calc.fiber-calculator.desc
calc.cholesterol.name
calc.cholesterol.desc
calc.stress-test.name
calc.stress-test.desc
calc.respiratory-rate.name
calc.respiratory-rate.desc
calc.blood-sugar.name
calc.blood-sugar.desc
Army Body Fat
Body fat % against US Army AR 600-9 standards.
calc.blood-type.name
calc.blood-type.desc
calc.body-surface-area.name
calc.body-surface-area.desc
calc.calories-deficit.name
calc.calories-deficit.desc
calc.lung-capacity.name
calc.lung-capacity.desc
calc.pregnancy-weight-gain.name
calc.pregnancy-weight-gain.desc
calc.sleep-debt.name
calc.sleep-debt.desc
calc.stress-score.name
calc.stress-score.desc
Waist-to-Height Ratio
Waist-to-height ratio for abdominal obesity.
calc.heart-rate-zone.name
calc.heart-rate-zone.desc
calc.water-intake-goal.name
calc.water-intake-goal.desc
calc.body-fat-navy.name
calc.body-fat-navy.desc
calc.meal-calorie.name
calc.meal-calorie.desc
calc.carb-cycling.name
calc.carb-cycling.desc
calc.fasting-window.name
calc.fasting-window.desc
calc.caffeine.name
calc.caffeine.desc
calc.smoking-cost.name
calc.smoking-cost.desc
calc.alcohol-cost.name
calc.alcohol-cost.desc
calc.calorie-deficit.name
calc.calorie-deficit.desc
calc.gym-value.name
calc.gym-value.desc
calc.bra-size.name
calc.bra-size.desc
calc.sister-size.name
calc.sister-size.desc
calc.sports-bra-size.name
calc.sports-bra-size.desc
About Health & Fitness Calculators
Track your health metrics with our free health and fitness calculators. Calculate your BMI, daily calorie needs, body fat percentage, heart rate zones, and more. These tools use medically-established formulas to give you accurate insights into your wellness. Every calculator works instantly in your browser, provides detailed charts and breakdowns, and includes expert-written guides to help you understand your results. No registration needed — just enter your data and get answers.